Example: Suppose the manufacturer claims that the mean lifetime of a light bulb is more than 10000 hours. In a sample of 30 light bulbs, it was found that they only last 9900 hours on average. Assume the sample standard deviation is 125 hours. At 0.05 significance level, can we reject the claim by the manufacturer?

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 58E: What is meant by the sample space of an experiment?
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Example:
Suppose the manufacturer claims that the mean lifetime of a light bulb
is more than 10000 hours. In a sample of 30 light bulbs, it was found that
they only last 9900 hours on average. Assume the sample standard
deviation is 125 hours. At 0.05 significance level, can we reject the claim
by the manufacturer?
Transcribed Image Text:Example: Suppose the manufacturer claims that the mean lifetime of a light bulb is more than 10000 hours. In a sample of 30 light bulbs, it was found that they only last 9900 hours on average. Assume the sample standard deviation is 125 hours. At 0.05 significance level, can we reject the claim by the manufacturer?
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